Prodorsal Setae Research Articles

Four new species of the superfamily Galumnoidea (Acari: Oribatida) from Ecuador

Four new oribatid mite species of the superfamily Galumnoidea, Pergalumna paradecoratissima sp. nov., Pergalumnaparalongisetosa sp. nov., Pergalumna ecuadorensis sp. nov. and Galumnopsis lanceosensilla sp. nov., are described fromEcuador. The genus Galumnopsis is recorded for the first time for the Ecuador. Pergalumna paradecoratissima sp. nov.is very similar in having the combination of foveolate prodorsum, striate notogaster, setiform sensilli, interlamellar setaeshorter than lamellar and rostral setae, absence of anterior notogastral margin and three pairs of notogastral porose areas,to Pergalumna decoratissima Pérez-Íñigo & Baggio, 1986 from Brazil, however it differs from the latter by morphologyof rostrum, body size, surface of anal plates and length of epimeral setae. Pergalumna paralongisetosa sp. nov. is verysimilar in having the combination of setiform sensilli, long prodorsal setae, absence of anterior notogastral margin, threepairs of notogastral porose areas and long adanal setae ad 1 and ad 2 to Pergalumna longisetosa Balogh, 1960 from CentralAfrica, however it differs from the latter by body size, lengths of sensilli and interlamellar setae, absence of medial pore,length of epimeral setae. Pergalumna ecuadorensis sp. nov. can be distinguished from all similar species by having theround rostrum, setiform sensilli, long and setiform prodorsal setae, absence of anterior notogastral margin, smooth bodysurface and three pairs of oval notogastral porose areas, and by the very long interlamellar setae. Galumnopsis lanceosen-silla sp. nov. can be distinguished from all similar species (with smooth body surface) by the morphology of sensilli which are lanceolate, with tooth in distal part.

Two new species of oribatid mites (Acari: Oribatida) from Vietnam

Two new species of oribatid mites (Acari: Oribatida) Aokiella xuansoni sp. nov. Vu, Ermilov et Dao (Carabodidae) and Papillacarus benenensis sp. nov. Vu, Ermilov et Dao (Lohmanniidae Berlese, 1916), are described. Both are based on adult specimens and collected in the soil ecosystem, from the Xuan Son National park, province of Phu Tho and from the Ben En national park, Thanh Hoa province, Vietnam. Aokiella xuansoni sp. nov. is recognized by the small size of body, the surface of body with large and small foveolae; the straight, thickish, interiorly directed two pairs of setae (c1 longer than c2); the rather short setae da and la, which obviously not reaching bases of setae dm and lm, respectively. Papillacarus benenensis sp. nov. is recognized by the large size of body; the surface of body with reticulate sculpturing; rostrum undulate; prodorsal setae long, slightly thickened proximally, conspicuously ciliate on both sides; sensilli with 15 long, pectinate branches; one pair of medially incomplete transversal bands; notogaster with 18 pairs of long, conspicuously ciliate setae; posterior half of notogaster strongly neotrichous (more than 50 pairs of small, branched setae); genital setae heterogeneous; epimeres neotrichous (setal formula: 10-9-5-4).

The Galumnoid fauna (Acari: Oribatida) of Cat Tien National Park (Southern Vietnam) with description of two new species

ABSTRACT We have registered 11 species, five genera, two families, of Galumnoidea in Cat Tien National Park (southern Vietnam). Genera Leptogalumna Balogh, 1960 and Neogalumna Hammer, 1970 are the first records for Vietnam. Two new species Pergalumna indistincta n. sp. and Galumna pseudokhoii n. sp. are described from dark loamy soil of Lagerstroemia forest. P. indistincta n. sp. is similar in notogastral indistinct areae porosae, punctate body surfaces, morphology of prodorsal setae, and incomplete dorsosejugal suture only to Pergalumna amorpha Mahunka, 2008 from Thailand, but differs by body size, morphology of notogastral areae porosae, and development of adanal setae ad 2. G. pseudokhoii n. sp. is very similar in location and morphology of notogastral areae porosae, morphology of rostral, lamellar, and interlamellar setae; location of lamellar lines; and incomplete dorsosejugal suture to Galumna khoii Mahunka, 1989 from Vietnam, but differs by body size, morphology of sensilli, and number of genital setae on anterior parts of genital plates.

A new species of Dolicheremaeus (Acari: Oribatida: Tetracondylidae) from Ethiopia

The oribatid mite genus Dolicheremaeus comprises more than 160 species. We describe a new species, Dolicheremaeus aethiopicus sp. nov. , collected in soil from Bale Mountains National Park (African region, Ethiopia). This new species differs from other species by a combination of the length of prodorsal setae; morphology of rostral setae and sensilli; morphology and number of notogastral condyles and the morphology of the notogastral setae; number of epimeral setae; and the morphology of leg setae u .

Morphology of Juvenile Stages ofMetabelba glabrisetaMahunka, 1982 andDamaeus auritusKoch, 1835 (Acari: Oribatida: Damaeidae)

The morphology of juvenile stages of the oribatid mites Metabelba glabriseta Mahunka, 1982 and Damaeus auritus Koch, 1835 (Damaeidae) is described and illustrated. The juveniles of Metabelba glabriseta are characterized by: cuticle smooth, with rare folds and also with slightly developed reticulate ornamentation dorso-laterally; cerotegument of body with conical or strongly oblong granules, that of some body setae cloud-like; rostral and lamellar setae of approximately identical length, with hardly developed barbs; sensilli with long flagellate tips, smooth; gastronotic region rounded posteriorly; almost all gastronotic setae with small flagellate tips, barbed, setae lp longest in larva, setae c1, c2, h1 longest in nymphs; cornicle k of nymphs long, slightly curled, distally slightly swollen and longitudinally split; all legs of juveniles shorter than body; setae d and v” on trochanter III appear in adult; famulus emergent. The juveniles of Damaeus auritus are characterized by: cuticle smooth, with rare folds; cerotegument of body with spherical granules, body setae without cerotegument; prodorsal setae barbed, setae ex and larval setae in short, strong, sensilli thickened, but with thin, bent tips; gastronotic region truncate (in larva) or rounded (in nymphs) posteriorly; some gastronotic setae vane-like; cornicle k of nymphs short, strong, conical; all legs (except II in nymphs) of juveniles longer than body. Famulus sunken. Juveniles are compared among the known species of Metabelba and Damaeus, and also among the genera Metabelba, Damaeus and Epidamaeus.

Morphology of Juvenile Stages ofPedrocortesella africanaPletzen, 1963 andAleurodamaeus africanusMahunka, 1984 (Acari: Oribatida)

Abstract. The morphology of juvenile stages of the oribatid mites Pedrocortesella africana Pletzen, 1963 and Aleurodamaeus africanus Mahunka, 1984 is described and illustrated. The juveniles of Pedrocortesella africana are characterized by: cuticle with reticular ornamentation and folds; body with microgranular cerotegument; prodorsal setae leaf-shaped, sensilli petiolate, tuberculate blades with a rounded distal margin; gastronotic region flat; larva and nymphs with nine pairs of leaf-shaped gastronotic setae; scalps folded, larval scalp with seven pairs of setae, nymphal scalps with six pairs of setae; leg famulus sunken. The juveniles of Aleurodamaeus africanus are characterized by: cuticle smooth; body with filamentous cerotegument and with very not numerous granules; prodorsal setae setiform (except short interlamellar setae in nymphs); gastronotic region convex in lateral aspect; larva and nymphs with 12 of setiform gastronotic setae; scalps with reticular ornamentation, larval scalp with nine pairs...

Setal variability of Hydrozetes lemnae and H. thienemanni (Acari: Oribatida: Hydrozetidae)

Setal variability and the other morphological characters of juvenile stages and adult of Hydrozetes lemnae (Coggi, 1897) and H. thienemanni Strenzke, 1943 were investigated. In the juveniles of both species the length and shape of some setae vary, especially in the gastronotic region, more so in H. lemnae, which is parthenogenetic and reproduces by thelytoky, than in H. thienemanni, which is dioecious. The former species usually has more thick setae in the anterior and medial regions of the gastronotum, especially in the larva, compared to the latter. In the juveniles of H. lemnae the prodorsal setae le and in are longer, and in the nymphs the gastronotal setae of the l-series are usually longer than in H. thienemanni. These species differ distinctly by the number of long setae in the posterior part of the nymphs; in H. lemnae three pairs of long setae occur, while in H. thienemanni only two pairs; the respective juvenile stages of H. lemnae are also smaller than those of H. thienemanni. In the adults the number of c-series setae varies, as seta c1 is lost, and in some individuals also seta c3, and only seta c2 remains.

Two new species of lohmanniid mites (Acari: Oribatei) from Kerala, India

Abstract Two new species of oribatid mites of the family Lohmanniidae viz. Annectacarus hammerae and Cryptacarus keralensis are described from Calicut University Campus, Kerala, India. The unique combination of features of A. hammerae which enable its demarcation from all known species include the roughened nature of median notogastral setae c1, d1 and e1, and bilaterally barbed nature of prodorsal setae except seta le. Cryptacarus keralensis is distinguished from other known members of the genus by its weakly developed ano-adanal suture and epimeral setal formula of 6-4-4-4. A key to Cryptacarus is provided.

Rhynchophorus ferrugineus and Rhynchophorus palmarum

<i>Rhynchophorus ferrugineus </i>and<i> Rhynchophorus palmarum</i>

A new genus and species of tarsonemid mite (Acari : Tarsonemidae) associated with a neotropical curculionid beetle (Coleoptera)

Flechtmannus homalinotus, gen. nov., sp. nov. (Tarsonemidae : Tarsoneminae : Tarsonemini) is described from larvae, adult females and males collected under the elytra of Homalinotus coriaceus (Gyllenhal) (Coleoptera : Curculionidae) from Piracicaba, State of Sao Paulo, Brazil. The phylogenetic relationships of Flechtmannus among other genera of Tarsonemidae are considered and the reduction of the prodorsal bothridial setae in adult females of this and other taxa of Tarsonemidae is discussed.

Transfer of Mecognatha Wood from Stigmaeidae to Mecognathidae, fam. nov., a new synonymy, and a key to families of Raphignathoidea (Acari: Prostigmata)

The family Eupalopsellidae Willmann (Acari: Prostigmata: Raphignathoidea) consists of seven genera that naturally resolve into two groups. The first includes Eupalopsellus Sellnick (the type genus), Eupalopsis Canestrini, Exothorhis Summers, Saniosulus Summers and Peltasellus Meyer and Ueckermann. These mites have four pairs of setae on their prodorsum, and the palpal tarsus, which carries a single terminal unbranched eupathidium, is longer than the palpal tibia. The empodia on all tarsi consist of one or two pairs of long ray lets which emerge from a median knob between the claws. The other group includes Paraeupalopsellus Srniley & Moser and Acaciacarus Gerson, Frost & Swift. These genera have only three pairs of prodorsal setae (sci missing); the palpal tibia is longer than the palpal tarsus, which bears a distal trident eupathidium, and the empodium has three pairs of tenent hairs arising from a rod-like axis.